In a future not too far away, androids that look exactly like humans begin to spread across the world. The android production company SA Corp. produced Giftia, a new kind of android that has the most amount of emotion and human-like qualities out of any other model ever seen. However, due to problems in technology, the androids have a service life, and once they pass that, it gets pretty bad. For this reason, SA Corp. creates a terminal service in order to retrieve Giftia that have gone past their service life. A new employee at the terminal service named Tsukasa Mizugaki forms a team with the Giftia Isla to retrieve the other androids. This series features Michiru Kinushima as the protagonist.

Before I realized, I had become the guardian of a dungeon, a Demon Lord. I was suddenly in a dangerous world with giant monsters loitering around, fighting for their existence, so I thought to go about developing the dungeon in order to not die but —- for some reason I was having quite the good time…. How did it turn out like this?The protagonist, Yuki, having to live in that world now, uses his bold and sharp senses and spends time with a supreme dragon girl and a vampire girl; Sometimes laughing, sometimes being angry, passing days doing what he likes.

‘Square’ is a region covered in monster-infested miasma. ‘Pieces’ are people aiming to recapture Square, fighting life and death battles every day with the fate of humanity in their hands. ‘Tellus’, a boy living in the monsters’ den, aims to become a piece with the hope of avenging his parents who were attacked by monsters. ‘Rune’, a member of the Trick Troupe that take care of Tellus, worries for the reckless kid. But one day, Tellus leaves town and sets out to fight monsters without their knowledge. A monster suddenly appears before him, the very one he swore revenge against for his parents, ‘Eques’!! “Everyone who took care of me… I’ll save you all for sure!” And so grand quest for revenge begins!

Two comic anthology volumes bundled with Vols 4 & 6 of the Blu-Ray Limited Edition release of the Plastic Memories anime.